Area Perimeter and Circles

A _____ is half of a circle.

• circumference

• pi

• semicircle

• composite figure

Mrs. Wilson placed the welcome mat shown below on her front door step. What is the PERIMETER of her welcome mat in feet? Round to the nearest hundredth. Don't forget to label.

If you have been given diameter, how do you find radius?

• Radius times radius

• a.  Radius plus radius

• Diameter divided by 2

What is the area of this circle?

• 6,079.04 ft

• 138.16 ft

• 69.08 ft

• 1,519.76 ft

What is the circumference of this circle?

• 78.5 m

• 31.4 m

• 15.7 m

• 3.14 m

Daniel has a circular rug that has a diameter of 16 inches. How much space does the rug take up?

• 200.96 in

• 50.24 in

• 803.84 in

• 25.12 in

Find the perimeter.

• 2.4 ft

• 6.4 ft

• 5.76 ft

• 1.2 ft

Rob is measuring his chocolate bar. It's length is 4 inches and its width is 6 inches. What is the perimeter?

• 12 in

• 24 in

• 20 in

• 576 in

What is the area of this shape?

• 160 sq ft

• 26 sq ft

• 80 sq ft

• 52 sq ft

What is the perimeter of this triangle?

• 20

• 10

• 160

• 17